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rcu: No-CBs-related sleeps to idle priority 

This commit converts the schedule_timeout_interruptible() call used by
RCU's no-CBs grace-period kthreads to schedule_timeout_idle().  This
conversion avoids polluting the load-average with RCU-related sleeping.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-05-07 16:36:10 -07:00
parent a9352f72d6
commit f5ca34643b
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tree_plugin.h
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@ -2005,7 +2005,7 @@ static void nocb_gp_wait(struct rcu_data *my_rdp)
/* Polling, so trace if first poll in the series. */ /* Polling, so trace if first poll in the series. */
if (gotcbs) if (gotcbs)
trace_rcu_nocb_wake(rcu_state.name, cpu, TPS("Poll")); trace_rcu_nocb_wake(rcu_state.name, cpu, TPS("Poll"));
schedule_timeout_interruptible(1); schedule_timeout_idle(1);
} else if (!needwait_gp) { } else if (!needwait_gp) {
/* Wait for callbacks to appear. */ /* Wait for callbacks to appear. */
trace_rcu_nocb_wake(rcu_state.name, cpu, TPS("Sleep")); trace_rcu_nocb_wake(rcu_state.name, cpu, TPS("Sleep"));